of spottiswood



0. S. COX.

PUMP.

Patented July 4, 1893.

(N6 Model.)

INVENTOH W/ TNE SSE S:

ATTORNEYS.

UNITED STATES PATENT OFFICE.

CARY S. COX, OF SPOTTIS'WOOD, CALIFORNIA.

PUMP.

$PEGIFIGATION"forming part of Letters Patent No. 500,856, dated July 4,1893.

Application filed July 12, 1892. Serial No.439fl75. (No model.)

To all whom it may concern:

Be it known that I, CARY S. COX, of Spottiswood, in the county of Kernand State of California, have invented a new and Improved Pump, of whichthe following is a full, clear, and exact description.

The object of the invention is to provide a new and improved well pump,which is simple and durable in construction, very effective in operationand more especially designed for deep wells.

The invention consists of certain parts and details and combinations ofthe same, as will behereinafter described and then pointed out in theclaim.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional side elevation of the improvement. Fig. 2 is asectional plan view of the pump cylinder and plunger valve there in, onthe line 2--2 of Fig. 1. Fig. 3 is a sectional plan view of the pumpcylinder on the line 3-3 of Fig. 1. Fig. 4 is a sectional plan View ofthe auxiliary cylinder and valve chest, on the line 4-4; of Fig. 1. Fig.5 is a face view of the steam chest with the cover removed; and Fig. 6is a side elevation of the slide valve.

The improved deep well pump is provided with a cylinder A, connected atits upper end with the outlet pipe 13, extending upwardly to the surfaceof the ground to discharge the water as hereinafter more fullydescribed.

On the lower end of the cylinder A is secured a perforated inlet 0,through which water enters from the well to pass through the perforated.bottom D, of the cylinder A, the said perforated bottom being providedwith the usual valves E, closing the perfora tions on the down stroke ofthe plunger valve F, held in the said cylinder A. The plunger valve F isprovided with a valve seat on its upper surface and with the openingsleading from the seat through the plunger. A ball valve G, which openson the downward stroke of the piston to permit water to pass from thelower part of the cylinder A to the upper part of the same is held onthe plunger by a cage. On the upward stroke of the plunger valve F, thevalve G closes so that the water in the upper part of the cylinderisforced out-through the outlet pipe B.

The piston rod H, of the plunger valve F extends through the bottom Dand the inlet 0. to connect with a piston I, mounted to slide in anauxiliary cylinder J, attached to the lower end of the inlet 0, so as toform part of the pump cylinder A. In one side of this auxiliary cylinderJ is arranged a steam chest K, connected with a pipe L, extending upwardto the surface of the ground to connect .at its outer end with asuitable source of motive agent supply. In this steam chestK is mountedto slide a slide valve N, controlling the inlet port a and the exhaustport 19 formed in the wall of the cylinder J. A port 0 is formed in thevalve N to connect the supply pipe L with the port ato permit the motiveagent to enter the lower part of the auxiliary cylinder J.

The valve N is provided with a fiat valve stem 0, extending upwardly andprovided near its upper end with a pin 0, extending through a slot clinto the upper end of the cylinder J. A similar pin 0 projects from thevalve N through the port a into the cylinder, the said pins 0' and 0being alternately engaged by the piston I on the up and down stroke ofthe latter so as to shift the valve N, as hereinafter described. Thelower part of the steam chest K is connected with an outlet pipe Popening into the well.

The operation is as follows: When the'valve N is in such a position asto connect by its port c, the supply pipe L with the port a, then themotive agent passes from the supply pipe into the lower end of thecylinder J to force the piston I therein upward. 'When the piston Inears the uppermost end of its stroke, it engages the pin 0, thuslifting the stem 0 and consequently the valve N, whereby the port a isdisconnected from the port a and the supply pipe L. The motive agent isthus cut oif from the lower end of the cylinder, and at the same timethe valve N opens the port b and the exhaust can take place through thesaid port I; and exhaust pipe P. When the piston I moves upward then thewater contained in the upper end of the pump cylinper A is pushed outthrough the outlet pipe B, and at the same time, water is drawn into thelower end of the pump cylinder A, through the inlet 0 and the openingsin the perforated bottom D. As soon as the motive agent is cut off, asabove described, then the weight of the plunger valve F causes thelatter to descend so that the piston I also moves downward. During thedownward movement of the plunger valve F the Valve Gtherein opens topermit the water contained in the cylinder A to flow to the top of thepiston and when the latter finally nears the lower end of its returnstroke, then the piston I likewise moves to a lowermost position andengages the pin 0 and finally shifts the valve N downward so that theport 0 again registers with the port a and the supply pipe L to permitthe motive agent to again enter the lower end of the auxiliary cylinderJ. The motive agent now forces the piston I upward thus lifting theplunger valve F to discharge the water, as

2o above described. The operation is then repeated in the manner setforth.

It is to be understood that during the time the valve N is in alowermost position, the exhaust port bis out 01f by the said valve N sothat the motive agent only acts on the piston I and forces the sameupward.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent In a pump, the combination with a pump cylinderand a plunger valve therein, of the auxiliary cylinderJ depending fromthe pump cylinder and provided with the ports a b and slot d, the pistonI in the auxiliary cylinder and secured to the plunger valve rod H, thechest K connected with the supply pipe L, and the slide valve N in thechest and provided with the pin 0 projecting through port a, and thevalve stem 0 having the pin 0' extending through the slot 01,substantially as herein shown and described.

CARY/S. COX. Witnesses:

J. G. PORTER, A. W. JACKSON.

